Why Cold Chain Transportation need to Industry Temperature and Humidity Sesnor to Monitor ?
The cold chain transportation technology is becoming more and more mature, and the storage and transportation of fresh ingredients such as fruits and vegetables are gradually standardized. Growers use airtight storerooms with controlled gas (CA) to store freshly picked fruits and vegetables. In CA storage, the temperature, humidity and gas composition of the storage environment are precisely monitored and controlled. Storing apples, pears, etc. in an airtight storage room can last 3 to 4 times longer than under normal conditions. The storage room uses various types of sophisticated sensors to accurately measure the temperature, humidity and CO2 concentration in the CA warehouse. The storeroom uses various types of sophisticated sensors to accurately measure the temperature, humidity and CO2 concentration in the CA storeroom.
To ensure that the fruit retains its consistency, composition, color and flavor for as long as possible, store it in a refrigerator with constant low temperature and high humidity. In addition, the composition of stored gas also has a significant effect on storage capacity. Ordinary air consists of 78% nitrogen, 21% oxygen, a small amount of carbon dioxide (0.04%) and various inert gases. In CA storage, the oxygen content in the storage chamber is reduced to a constant low oxygen level by adding nitrogen, while the CO2 content is increased. This slows down the natural ripening process and preserves the quality of the fruit for a longer period of time.
This slows down the natural ripening process and preserves fruit quality for longer. Typical storage conditions are mainly in the following range: < 2% oxygen, 0.5-5℃ temperature, 0-5% carbon dioxide, up to 98% relative humidity. The requirement of temperature and humidity transmitter is high in the high temperature condition. HENGKO IP67 waterproof stainless steel temperature and humidity sensor housing protect PCB modules from dust, particulate pollution and oxidation of most chemicals to ensure sensors a long-term stable operation, higher reliability and long service life.
Some Storage Technology About Storage-Fruit and Vegetables You Should Know
DCA (Dynamic Controlled Atmosphere) storage technology is an enhancement to traditional CA storage. It takes into account that stored fruit continuously releases heat, water, carbon dioxide and ethylene to ambient air through cellular respiration, which changes the composition of stored gases. In DCA storage, oxygen levels as well as ethylene and carbon dioxide concentrations are continuously monitored and dynamically controlled. The aim is to achieve the lowest possible oxygen level, just above the anaerobic compensation point.
In so-called Ultra Low Oxygen (ULO) or Very Low Oxygen (XLO) storage facilities, oxygen levels are gradually reduced to around 0.7% to 1%. This puts the stored fruit into a "coma" state that minimizes the fruit's metabolism. Accurate temperature and humidity sensors and carbon dioxide sensors are prerequisites for optimal storage conditions. To ensure ideal storage conditions, CA/DCA storage chambers are equipped with various technical systems for cooling, cooling, humidification and gas management. Continuous monitoring of relevant climate parameters with the help of suitable sensors. Continuous monitoring of relevant climate parameters with the help of suitable sensors. Humidity, temperature and CO2 are the most important parameters that need to be monitored in CA/DCA storage. Due to the prevalent challenging conditions in storage rooms, the following requirements are placed on temperature and humidity sensors:
- High precision (<2 % RH)
- Long term stability in high humidity
- Contamination-resistant measuring principle, ideally with automatic calibration
- Resistant to chemical contamination
- Anti-condensation
- Rugged temperature and humidity enclosure with protection class IP65 or higher
- Maintenance and replacement of sensor
HENGKO IOT temperature and humidity solution series products can meet these requirements. HENGKO high precision temperature and humidity transmitter with IP67 waterproof relative humidity sensor probe housing can resist chemical pollution and continue work in the harsh and high temperature environment. Split-type humidity sensor with exchangeable RH probe is easy to maintain and replace the probe.
If you also have projects that need to monitor and control temperature and humidity, can check our products of temperature and humidity sensor, temperature and humidity tansimitter etc
have any questions and interested, please feel free to contact us for details by email ka@hengko.com. Our Salesman will send back within 24-Hours.
Post time: Jan-13-2022
